Hi, and thanks for posting this example for FileWriteC and FileReadC

I tried them with PLCSIM advanced but no file is written to the Virtual PLC SIMATIC_MC folder, and if I place a text file in the folder, the virtual PLC does not read the data. 

In both cases, the DONE counter increments, and the status word momentarily goes to zero, then back to 16#7000.

My question is, should this function work in PLCSim Advanced? If so, can you suggest any reason why it's not working?

Hi JDCAL

I have same problems with PlcSimAfdv.
Conclusion must be that this function is not supported by PLCSimAdv 2.0.

Nb. Please keep in mind that there is a small bug or misunderstanding in the example.
He is Reading and Writing into the same memory area: (DataBlock1.MyReadData)

/Søren

I wanted to use the function for to backup and restore my recipe data BASE in the PLC CPU1515

I tried the Write and the read function, it works nicely. After that I tried to change the Data Type from array[0...16] of byte to array[0..16] of int. after that I tried the write function again and get the error 16#8A51 Invalid data type of the "DATA" parameter.

is it only possible to read and write bytes ? I use all kind of Variables in my reciepe, as bool, int, String, structures,... except bytes.

If there is only bytes allowed, is there another way to write an data block to the MMC card, just for to use as Backup function, it is not needed to read it by excel, but it will be more nice !

kind regards and thanks for an answer

A.

 Hi,

File Read / Write just support byte array streams, in case you have different data structures like array of int you need at first serialize / deserialize to or from byte array :-)

BR

RedCali

AutoGen_546810

I wanted to use the function for to backup and restore my recipe data BASE in the PLC CPU1515

I tried the Write and the read function, it works nicely. After that I tried to change the Data Type from array[0...16] of byte to array[0..16] of int. after that I tried the write function again and get the error 16#8A51 Invalid data type of the "DATA" parameter.

is it only possible to read and write bytes ? I use all kind of Variables in my reciepe, as bool, int, String, structures,... except bytes.

If there is only bytes allowed, is there another way to write an data block to the MMC card, just for to use as Backup function, it is not needed to read it by excel, but it will be more nice !

kind regards and thanks for an answer

A.

For using the functionality with PLCSim Advanced:

Try to store your data (e.g. data.txt) in a Folder named UserFiles (..\SIMATIC_MC\UserFiles\data.txt)

Then use the relative Path: UserFiles\data.txt for your FileReadC-FunctionBlock.

Notice: The name of the folder "UserFiles" is important. Any other name didn't work in my program.

(I used PLCSIM Advanced 4.0)